Resistance Calc Pokemon Math Help Calc?

Math help calc? - resistance calc pokemon

A rock will fall from a tower 350 meters. (Gravitational acceleration is -9.8 m/s2. Ignore air resistance. Give your answers correct to two decimal places.)
(a) Determine the distance between the stones on the ground at time t
h (t) =

(b) How long does it take to reach the stone on the floor?
s

(c) With what speed it on the floor?
m / s

(d) If the stone thrown down at a speed of 7 m / s, how long it takes to reach the ground?